數(shù)詞用法講解及練習(xí)

數(shù)詞I?定義與分類數(shù)詞是指表示數(shù)目多少或順序先后的詞。表示數(shù)目多少的數(shù)詞叫基數(shù)詞，如one,five,ten,thirty,sixty-five等；表示順序先后的數(shù)詞叫序數(shù)詞，如first,sixth,tenth,twenty-first等。數(shù)詞用法相當(dāng)于名詞和形容詞，在句中可用作主語、賓語、表語、定語、同位語等。基數(shù)詞英語中沒有萬"這個(gè)讀數(shù)單位，要表示漢語中的 萬”英語需借用thousand—詞，如一萬”用“十個(gè)千”表示(tenthousand)，“十萬”用“一百個(gè)千”表示(onehundredthousand)。用作基數(shù)詞單位的 hundred,thousand,million,billion 通常不帶復(fù)數(shù)詞尾-s,但若用于表示數(shù)百、數(shù)千、數(shù)百萬這樣的泛指，則用復(fù)數(shù)。如：Abouttwothousandpeoplediedintheearthquake.大約有兩千人在地震中喪生。Thousandsofpeoplegototheseasideeveryyear.每年成千上萬的人到海濱去。表示整十的基數(shù)詞用復(fù)數(shù)形式可以表示人的大約歲數(shù)或年代。如：Heisinhisearlytwenties.他才二十出頭(from。Thistookplaceinthe1930s.這事發(fā)生在20世紀(jì)30年代。序數(shù)詞許多序數(shù)詞是由相應(yīng)的基數(shù)詞后加詞尾-th構(gòu)成的,如four/fourth,six/sixth,ten/tenth,sixteen/sixteenth,但是nine變?yōu)樾驍?shù)詞是ninth,而不是nineth。twentieth,thirtieth,fortieth 等表示整十的序數(shù)詞， 由相應(yīng)的基數(shù)詞將詞尾 y改為ie，再加-th構(gòu)成。first,second,third通?？煽s寫為1st,2nd,3rd。凡是以th結(jié)尾的序數(shù)詞可縮寫為“基數(shù)詞+th”：4th,5th,9th,11th,60th,128th等。非整十的多位數(shù)，將個(gè)位數(shù)變成序數(shù)詞即可：twenty-first(第21)，thirty-sixth(第36)，ninety-ninth(第99)，threehundredandsixty-fifth(第365)等。hundred,thousand,million等序數(shù)詞形式為hundredth,thousandth,millionth等。序數(shù)詞前通常要用定冠詞，但表示考試或比賽等的名次時(shí)，通常可省略其前的定冠詞。如：Myroomisonthesecondfloorandhisonthethird.我的房間在三樓，他的房間在四樓。Hewas(the)thirdintheexam.他考試得了第三名。注：有時(shí)序數(shù)詞前不用定冠詞，而用不定冠詞，表示次第在原有基礎(chǔ)上的增加。如：We'llhavetodoitasecondtime.我們得再做一次(from。序數(shù)詞前用定冠詞和不定冠詞的區(qū)別在于：定冠詞表特指，不定冠詞表泛指，有類似another的意思，但比another的意思更明確。分?jǐn)?shù)、倍數(shù)、小數(shù)和百分?jǐn)?shù)分?jǐn)?shù)。分?jǐn)?shù)由基數(shù)詞和序數(shù)詞構(gòu)成：分子用基數(shù)詞，分母用序數(shù)詞，當(dāng)分子超過 “1時(shí)”，分母用復(fù)數(shù)。如：twothirds=2/3threefifths=3/5注：1/2通常讀作a[one]half，一般不讀作asecond；1/4可讀作a[one]fourth，也可讀作a[one]quarter。分子與分母之間加in,分子在前，分母在后，分子分母都用基數(shù)詞。如 oneinten十分之一，fiveineight八分之五。分子與分母之間加outof,分子在前，分母在后，分子分母都用基數(shù)詞。 如oneoutoften十分之一，fiveoutofeight八分之五。倍數(shù)。英語中表示倍數(shù)時(shí)通常借助 half,double,twice,threetimes等之類的詞。如：They'retwicethesizeofchickens.它們比雞大一倍。Theirhouseisaboutthreetimesasbigasours.他們的房子大約有我們房子三倍大。倍數(shù)的幾種表達(dá)法倍數(shù)+as+形容詞/副詞(原級(jí))+as。如：Thisbridgeisthreetimesaslongasthatone.這座橋是那座橋的三倍長。倍數(shù)+形容詞或副詞的比較級(jí)+than。如：Thisbridgeisthreetimeslongerthanthatone.這座橋是那座橋的三倍長。⑶倍數(shù)+thesize/length/weight 表?示比較對(duì)象的名詞。如：Thisbridgeisthreetimesthelengthofthatone. 這座橋是那座橋的三倍長。倍數(shù)+what引導(dǎo)的從句。如：Thecollegeistwicewhatitwas5yearsago.這所大學(xué)是它五年前的兩倍。百分?jǐn)?shù)。百分?jǐn)?shù)由基數(shù)詞和百分號(hào) (％)組成，百分號(hào)(％)讀作percent。如：thirtypercent=30%, 60percent=60%用基數(shù)詞+percent”若表示幾分之幾或百分之幾十的人或物時(shí)，用加 of,作主語時(shí)，謂語動(dòng)詞的數(shù)與of后的名詞數(shù)一致。如：Fortypercentofthestudentswearglasses.百分之四十的學(xué)生戴眼鏡。Two-thirdsofthemoneywasspentonfood.三分之二的錢都花在食物上。注意：percent—律用單數(shù)形式.小數(shù)。小數(shù)點(diǎn)前的數(shù)按總數(shù)念，同其它基數(shù)詞讀法一樣，小數(shù)點(diǎn)用 point，小數(shù)點(diǎn)后面的數(shù)按基數(shù)詞一個(gè)一個(gè)單獨(dú)念。女口讀作ninepointsixfive。讀作twohundredandeighteenpointthreenine。日期1949年1949讀作nineteenforty-nine6月23日J(rèn)une23rd讀作June(the)twenty-third或thetwenty-thirdofJune2006年10月October2006讀作October,twothousandandsix1600年5月2日May2nd,2005讀作thesecondofMay,sixteenhundred鐘點(diǎn)半小時(shí)用half，一刻鐘用aquarter，半小時(shí)以內(nèi)用 past,超過半小時(shí)用to。08:00eighto'或oeight09:15ninefifteen或aquarterpast/afternine02:30twothirty或halfpast/aftertwo05:45fiveforty-five或aquartertosix14:15fourteenfifteen=p.m.23:05twenty-threeohfive24:00twenty-fourhundredhours=midnight編號(hào)單純的編號(hào)，可在基數(shù)詞前加 number，簡寫為No.。如第二。序號(hào)與事物名詞連用時(shí)分三種情況 (from:(1)小序號(hào)可用“the序數(shù)詞+名詞"或名詞+基數(shù)詞”如第一次課可以說theFirstLesson或LessonOne。⑵大序號(hào)通常只用名詞+數(shù)詞”如808號(hào)房間Room808；168路公共汽車Bus;南京路1490號(hào)1490NanjingRoad;電話號(hào)碼(用基數(shù)詞逐個(gè)念，0念字母O)。(3)用“a/the+number+基數(shù)詞+名詞”女口abus一輛三路公共汽車，thebus那輛三路公共汽車。約數(shù)用tens/dozens/scores/hundreds/thousands/millionsof 表示幾十、幾百、上千、成千上萬"等。如：Theboyboughtdozensofpencils.那個(gè)男孩買了幾十支鉛筆。Thousandsofpeoplediedintheearthquake.數(shù)以千計(jì)的人死于地震。(1)dozen,score,hundred,thousand,million等表示確切數(shù)量時(shí)，不用復(fù)數(shù)。女口 fivedozeneggs五打雞蛋，threehundredpeople五百個(gè)人。但score用法略有不同，與數(shù)詞連用時(shí)，也加of。女口twoscoreofeggs(40個(gè)蛋)。⑵有時(shí)單數(shù)形式的dozen,score,hundred,million等前面有數(shù)詞，后面也有of,此時(shí)的of表示的是部分與整體的關(guān)系，其后一定是them,us之類的人稱代詞或者有the,these,your之類的限定詞。女口Iwanttobuythreedozenoftheeggs.(我想買其中的三打蛋)(from用lessthan,under,below,almost,nearly,upto等來表示小于或接近某數(shù)目。如nearlytwohours將近兩個(gè)小時(shí)。用morethan,beyond,ormore,over,above等來表示超過或多于某個(gè)數(shù)目。女口 morethan100years一百多年。用or,orso,about,around,some,moreorless等表示在某一數(shù)目左右。 女口about50pens大約五十支鋼筆， amonthorso大約一個(gè)月。用to,from…to…,betweend表示介于兩數(shù)詞。如：Hissalaryrosefrom100dollarsamonthto120dollarsamonth.他的工資從每月 100美元升到了每月120美元。年代表示在某個(gè)世紀(jì)的幾十年代， 用“inthe逢十的基數(shù)詞的復(fù)數(shù)”?；鶖?shù)詞的復(fù)數(shù)若用阿拉伯?dāng)?shù)字表示，可直接加s,也可加's如在20世紀(jì)80年代”是inthe1980或inthe1980s，讀作inthenineteeneighties。注意：不要漏掉the。X年齡1.表示某人幾歲的確切年齡，用 基數(shù)詞+yearsold或"基數(shù)詞+ofage或者“attheagef基數(shù)詞”也可直接用基數(shù)詞。如：HebegantostudyEnglishat(theageof)seventy.他70歲開始學(xué)英語。She'sseventyyearsold.=She 'sseventy她ears歲了ge.

表示某人幾十多歲這樣的約略年齡，用 "inone逢十+勺基數(shù)詞的復(fù)數(shù)（如tens,twenties,thirties等）'來表達(dá)。如：HewenttoAmericainhisthirties.他30多歲時(shí)去了美國。XI.算式2+8=10Twopluseightis/equalsten.Twoandeightare/equalten.Ifyouaddtwoandeight,youwillgetten.8-2=6Eightminustwois/equalssix.Twofromeightis/equalssix.Ifyousubtracttwofromeight,youwillgetsix2x8=16Twomultipliedbyeightis/equalssixteen.Twotimeseightis/equalssixteen.Ifyoumultiplytwobyeight,youwillgetsixteen.8十2=4Eightdividedbytwois/equalsfour.Eightovertwois/equalsfour.Ifyoudivideeightbytwo,youwillgetfour.數(shù)詞專項(xiàng)練習(xí)()1.ThePeople'sLiberationArmywasfounded .A.onAugust1,1927B.in1927,1AugustC.onAugust1st,1927D.inAugust1,1927( )2.A boycansingtheEnglishsongverywell.A.ten-year-old B.tenyearsoldC.ten-years-oldD.tenthyearsoldwovenbythosetwom( )3.Anhourlater, ministerwassenttoseethe “magicclothwovenbythosetwomA.two B.thesecondC.thetwo( )4.Doyouthinkthereisanyroomforus A.two B.thetwo C.second()5.Whichnumberiswrong .A.Ninety B.Ninteen C.NinthA.two B.thesecondC.thetwo( )4.Doyouthinkthereisanyroomforus A.two B.thetwo C.second()5.Whichnumberiswrong .A.Ninety B.Ninteen C.Ninth()6.Thenumber4,123isread .A.fourthousandonehundredandtwenty-threeD.secondD.thesecondD.Nineteenththousandandonehundredtwenty-threeC.fourthousandandahundredandtwenty-threeD.fourthousandsahundredandtwenty-three( )7.Theoldprofessorstillworkshardthoughheis .A.inhissixtyB.inhissixtiesC.insixtiesD.inthesixty()8.Thisclassroomis ours.A.threetimesbigasB.asthreetimesbigasC.threetimesasbigasD.asbigthreetimesas()9.Thebasketballteamofourschoolranks inthematch.A.three B.third C.thethree D.thethird()10.WhichisthecarthathedrivesIt 's .A.fiftytwoB.thefifty-twocarsC.thecarfiftyfourD.thefifty-fourthcar()11.Whichofthefollowingiswrong .A.Heisafifteen-year-oldboy.B.Heisattheageof15.C.Heisaboyof15.D.Heisfifteenyearold.()12.Ourschoolisnotverybig.Thereareonly students.A.ninehundredsofB.ninehundredC.ninehundredsD.ninehundredof()13.Howmanynewwordsaretherein lessonThereareonly A.five;fifthB.fifth;fiveC.thefifth;thefiveD.thefifth;five()14. ,Coca-ColabegantoenterChina 'smarket.A.In1970'B.sIn1970sC.Inthe1970sD'.Inthe1970sTOC\o"1-5"\h\z()15.Therewasnobusinthatsmalltown.Wehada .A.tenmileswalkB.ten-milewalkC.tenmile'swDa.lktenthmilewalk()16.Whichroomdoyoulivein .A.The201RoomB.Room201C.Room201stD.The201'sRoom()17.Threehundredthousandonehundredandseventymeans .A.3,170 B.3,117C.300,170D.30,170()18.OnMay , peopletraveledroundthecountry.A.thefirst,millionsB.thefirst,millionsofC.first,themillionthD.first,millions()19. ofthemarediningatschool.A.TwelveB.TwelfthC.ThetwelveD.the12th()20.7:17isread .A.sevenandseventeenB.sevensevenC.sevenonesevenD.sevenseventeen()21.Four twoistwo.A.plusB.minusC.timesD.dividedby()22.Three fiveiseight.plusB.minusC.timesD.dividedby()23.Three sevenistwenty-one.plusB.minusC.timesD.dividedby()24.Forty-two sevenissix.plusB.minusC.timesD.dividedby()25.Thereare daysinayear.A.threehundredsixtyandfive B.threehundredandsixty-fiveC.threehundredsandsixty-fiveD.threehundredsixty-five()26.Thereare studentsinthatschool.A.twothousandeight-six B.twothousandeighty-sixC.twothousandandeighty-six D.twothousandsandeighty-six()27.Ittookme togetthere.A.twohoursandahalfB.twohoursandhalfC.twohourandahalfD.twohourandhalf()28. isaverytallboy.A.ThetwelveB.ThetwelvethC.ThetwelfethD.ThetwelfthTOC\o"1-5"\h\z()29.“Whatyearisit”“It's .”A.nineteenhundredandninety-seven B.nineteenandninety-sevenC.nineteenninetyandsevenD.nineteenninety-seven()30.“What'sthedatetoday ”“It's .”A.TuesdayB.JuneFourthC.JunethefourD.Junethefourth()31.ThetrainfromShanghaiwillarrive .A.inquarterpastsixB.inaquarterpastsixC.atquarterpastsixD.ataquarterpastsix()32.Myfriendwasbornon .A.threeofJuly,1979B.thethirdofJuly,1979C.1979,JulythethirdD.1979,thethirdofJuly()33. islessthan .A.One-third;two-thirds B.One-third;two-thirdC.First-three;first-threesD.One-third;one-three()34.Whichlessondidyoulearnyesterday_ .A.LessonSevenB.LessonseventhC.The7LessonD.7Lesson()35.TherewillbeacomedyonTVat thisevening.A.sevenpastthirtyB.halfpastsevenC.seventhethirtyD.thirtytoseven()36.Ittookme tofindoutthekeytothedrawer.A.oneandhalfhoursB.oneandahalfhoursC.oneandahalfhourD.oneandhalfhour()37.I'msotiredafter walk.A.threehoursB.threehours C'.threehour D'.sthreehour()38.Thereare starsinthesky.A.millionofB.millionsofC.themillionD.amillionof()39.Thestreetis wide.A.twometersB.twometerC.thetwometerD.atwometer()40.Mostofthestarsaremuchbiggerthanthesun.Buttheyare lightyearsawayfromus.A.thousandB.thousandsC.thousandofD.thousandsof( )41. ofthesurface(表面)oftheearthiscoveredwithwater.A.FirstthirdB.TwothirdsC.OnethreeD.Twothree( )42.Thereare peopleinmyfamily.Weliveonthe floorinatallbuilding.A.five,sixB.fifth,sixthC.fifth,sixD.five,sixth()43.Thefloodhappened .A.inthesummerof1998 B.inthesummerof1998sC.in1998ofthesummer D.in1998softhesummer( )44.---Howsoonwillyoufinishyourwork---Inabout .A.oneandahalfmonthB.onemonthandahalfC.oneandhalfamonthD.amonthandhalf( )45.Wewillhavea holiday.WhataboutgoingtoSuzhouA.fivedaysB.fivedayC.five-dayD.five-days( )46.Wearesurethe centurywillbringusmorehopes.A.twentieth-firstB.twentieth-oneC.twenty-oneD.twenty-first( )47.Attheageof ,hehadhisownlab.A.thirtyB.thirtiethC.thethirtieth D.thethirty( )48.---Wouldyoulikesomefruit,madam---Oh,yes. ,please.A.5kilobananasB.5kilosofbananasC.5kiloofbananasD.5kilosofbanana( )49.Thisbuildingisfora .A.familyofthreeB.threepeopleC.threepeoplesfamilyD.threepeople 'sfamily( )50.Lookatthetable.Tomwantstobuyahamburger,alargecokeandanice-cream.HowmuchwillhepayHamburger$Orangejuice$Hotdog$Coffee$Ice-cream$Water$Popcorn$Largecoke$A.Threedollarsandsixtycents. B.Fivedollarsandthirty-fivecents.C.Fivedollarsandsixtycents. D.Twodollars.音標(biāo)語法詞匯閱讀綜合訓(xùn)練Fillintheblanksaccordingtothephonetictranscriptions.t(ibringy(?urnilnearf,Mary?I /'getupat .Chinjisagrxiat /'kAntnA1.Thekinglusttlie flurd/twoyetii^Inter.5h1 'ra：d^(rystayatliomrandwut<+hTV.Completethefollowingpassageswiththewordsorphrasesinthebox.Eachcanonlybeusedonce.(A)A.chairs B.amazing C.causeD.atleast E.dangerousHomeshouldbethesafestplaceofall,butcarelessnessmakesitoneofthemost 6 .Accidentscanhappenwhenpeopleusetablesand 7 asladdersandmisusekitchenappliances.Manyhomeaccidentsinvolvefalls.Objectsthatareleftonfloorscanmakeothersfallover.Thekitchenisanotherplacewheremanyfallstakeplace.Cleaningupwateroffthefloorcanpreventmanyaccidents.Burnshappenmostlyathome,andmanyofthemhappeninthekitchen.Ahotovenisanobviousdangerthatcan8painfulburns.Cookingwithheatshouldbedonebyadults,or9withanadultaround.(B)A.without B.signsC.insteadof D.aswellasE.regularlyHousefiresarealsoaseriousproblem.Theyoftenstart 10 beingnoticed,soeveryhouseshouldhaveonesmokedetector(探測器) oneachfloor.Thedetectorscandetect,orsense,anysignofsmokeandwarnyouwithanalarm.Everyfamilymembershouldknowwhattodowhenthereisafire.Onceagreedupon,thesesafetyrulesshouldbereviewedandpractisedtogether 11 .Thispracticewillcreateamuchsaferhome.Accidentsoftenhappeninpublicplaces 12 athome.Accidentstakeplaceintheseplacesfortwomainreasons.First,mostvisitorsareunfamiliarwiththeseplaces.Second,publicplacesareoftencrowded.Whileyouareintheseplaces,payattentionto 13 warningaboutanydangers.Completethesentenceswiththegivenwordsintheirproperforms.Asweallknow,Edisonwasoneofthegreatest intheworld.(scienee)Wemustkeepthebalaneeof .(natural)Ofallthesubjects,Ilike best.（chemical）Stayinginanair-conditionedroominsummermakesmefeel .（comfort）Teachersshouldbe toallthestudents.（patiently）Itis totalkloudlyinthereadingroom.（polite）Thedetectivestoryhasa ending.Ilikeitverymuch.（drama）Allthestaffinthisbigcompanyhad examlastweek.（medicine）Completethefollowingsentencesasrequired.Cathyiskeenonplayingchess.（保持句意基本不變）Cathyis playingchess.Mymotherseldomgoestoworkbycar.（改為反意疑問句）Mymotherseldomgoestoworkbycar, Igotothecinemaonceamonth.（對(duì)劃線部分提問） doyougotothecinemaItisveryimportanttopayattentiontoroadsafety. （改為感嘆句） itistopayattentiontoroadsafety!Thegovernmentwillwidenthisoldstreetnextyear.（改為被動(dòng)語態(tài)）Thisoldstreetwill bythegovernmentnextyear.WhenwillMarygotravellingTheprofessorwantedtoknow. （改為復(fù)合句）Theprofessorwantedtoknow Mary gotravelling.paid,MissLi,inthatsupermarket,800yuan,anewcarpet,for（連詞成句）Choosethebestanswer.Mostpeoplehavedogsaspets.ButdoyouknowthatdogscanalsododifferentjobsOnSeptember11,2001,terrorists（恐怖分子）attackedthe.andnearly3,000peopledied.Atthattimeover300dogsweretheretohelptofindandsavepeople.Theyareworkingdogs.TheU.S.armybegantousedogsduringWorldWarI.Now,about2,700dogsareworkinginAfghanistanandIraq,accordingtoDiscoveryNews.Thesefour-leggedsoldiersusetheirpowerfulsenseofsmelltofindbombs,drugsandenemies.Dogsare“man'bestfriends”.Theycanhelpusworkbetter.Themostcommonjobsforworkingdogsareinsearchandrescue.Theycanfindlostpeopleorbodiesafterabigdisasterorinthewild.Guidedogscanhelpblindpeoplewalksafely.Thesedogscanunderstandsomewords.GuidedogsarepopularintheU.S.andJapan.ManyguidedogsvisitedChinaduringtheBeijingOlympicGames.Therearealsodogsworkingwithdoctors.Theycanhelpautistic（自閉癥的）children.Thesechildrensometimesdon'talkandliketodothesamethingsagainandagain.AstudyfromCanadain2010showedthatdogscouldmakeautisticchildrenfeelrelaxedandsafe.Herdingdogsareimportanttosheepowners.Theykeepthesheepsafe.TheyarecommoninAustralia,NewZealandandsomepartsofChina.Nowadays,manypeoplehavethemaspets.Sodogsarenotonlyourpetsbutalsoourworkmatesnow.（ ）29.WorkingdogsinAfghanistanandIraqhelpto .A.keeppeoplesafefindandsavepeoplefindbombs,drugsandenemieskeeptheenvironmentclean()30.Themostcommonjobsforworkingdogsarein .A.helpingblindpeoplewalksafelysearchandrescuehelpingautisticchildrenkeepingsheepsafe()31.Guidedogsarepopularin .A.ChinaandJapanCanadaandtheU.S.AustraliaandtheU.S.theU.S.andJapan()32.AlotofguidedogscametoChinain .A.2001B.2007C.2008D.2010()33.Theunderlinedwords“herdingdogs”inParagraph8mean“ ”inChinese.A.狩獵犬B.牧羊犬C.警犬D.玩具犬()34Thebesttitleforthispassageis .A.Four-leggedsoldiers B.GuidedogsarepopularC.Dogsareourpets D.PeopleanddogsmakeagreatteamChoosethebestwordsorexpressionsandcompletethepassage.Ifyouwanttoknowwhattheweatherwillbe ___35___tomorrow,youcanfindaforecastinthenewspaper,onTV,orontheInternet.Untilabout150yearsago,however,forecastsweremadebypeople___36___theirsurroundings.Theypaidattentiontothecloudsandthewind.Theynoticedwhatanimalsweredoingandhowplantsweregrowing.Today,forecastingtomorrow'sor___37___week'sweatheristhejobofmeteorologists(氣象學(xué)者),scientistswhostudytheweather.Modernweatherforecastingdependsoncollectingenormous(巨大的)amountsofinformation—allaroundtheworld.___38___inthe1840s,AmericanscientistJosephHenrygottheballrolling(開始某項(xiàng)活動(dòng))formodernforecasting.Hesetupanetworkofabout150volunteerweatherobserversacrossthe.Eventually,600observers___39___temperature,airpressure,andotherconditionsintheirareaeveryday.TheysentthisinformationbytelegraphtotheSmithsonianInstitutioninWashington,whereHenryworked.There,hedisplayedthenation'sweatherconditionsonalargemap.ThesuccessofHenry'svolunteers___40___thecreationoftoday'sNationalWeatherService.()35.A.as B.like C.forD.about()36.A.observing B.discoveringC.gaining D.learning()37.A.lastB.firstC.everyD.next()38.A.BackB.OverC.AwayD.Past()39.A.measuredB.praisedC.testedD.increased()40.A.stoodforB.seemedlike C.ledtoD.turnedintoReadthepassageandfillintheblankswithproperwords.CellphonesandtheInternethaveimprovedourlivesinmanyw___41___.However,theyhavealsobroughtanumberofworryingproblemsthatneedtobenoticed.Manycaraccidentsarec___42___bycellphones.NowpeoplecanusecellphonestogetontheInternet,anditisveryconvenient.ButsomedriversgetontheInternetwhentheyaredriving.Drivingneedsdrivers'attention.Thesec___43___driversareadangertousallbylookingattheircellphonesandnotattheroad.ManyofthedangersoftheInternetarewellknown.Childrenwhov___44___websiteswithouttheirparents'permission（允許）sometimestalktostrangers,andputthemselvesingreatd___45___.Peoplewithblogssometimespostembarrassingphotographsofothersontheirwebsiteswithoutpermission.TherearealsopeoplewhousetheInternettogetotherpeople 'sp___46___ information.CellphoneandInternetsafetytips:Ifyouneedtouseacellphonewhiledriving,usea“hands-free”phone.Indifficultdrivingsituationssuchasrainorsnow,donotuseyourphoneatall.TellyourchildrennottotalkwithanyonetheydonotknowontheInternet.R___47___togiveoutanyimportantpersonalinformationontheInternet.Answerthequestions.Ellawasleft-handed.Whenshegotinthethirdgrade,hermarkswereextremelypoorbecauseherteacher,MissMennis,couldn'tunderstandElla'sterriblehandwriting.MissMennisforcedEllatowritewithherrighthand.SheevenstoodoverpoorlittleEllaandmadesurethatthepupilwasn'tusingherlefthand.WhenEllagotinthefourthgrade,shehadamuchyoungerteacher,MissKindred.Shegavepupilshandwritingexercises.Oneday,sheaskedEllatostayintheclassroomafterclass.EllathoughtMissKindredwasgoingtopunish（懲罰）herbecauseofherbadhandwriting.MissKindredaskedEllatowriteafewwordswithherrighthand.ThenshemadeEllawriteafewwordswithherlefthand.Ellalookedupatherwhenshefinishedwriting,andtheteacherhadawarmsmileonherface.MissKindredgaveEllaawr